当前有两个 ViewController已被显示到根视图中,控制台打印的文本顺序为?( )
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
static int number = 1;
NSLog(@"%d", number);
number += 2;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
number -= 1;
});
NSLog(@"%d", number);
}
@end